Alright, let's work through 2122 times 3420 step by step
2122 × 3420 = 3420 × (2122)
+ 3420 × 2 what gives us 6840
+ 3420 × 20 resulting in 68400
+ 3420 × 100 resulting in 342000
+ 3420 × 2000 what gives us 6840000

= 7257240
